CVE-2026-93796

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93796", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-18T17:59:28.789Z", "datePublished": "2026-09-24T16:02:29.478Z", "dateUpdated": "2026-10-30T12:36:47.103Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:36:47.103Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: iwlwifi: pcie: null RX pointers after free\n\nWhen iwl_pcie_tx_init() fails after RX init, nic init unwinds via\niwl_pcie_rx_free().\n\nThe freed RX members stayed non-NULL on the live transport object,\nso later teardown or retry could touch stale RX state.\nSet rx_pool, global_table, rxq, and alloc_page to NULL after free\nto make repeated cleanup and retry paths safe."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The dangling pointers are created in iwl_pcie_rx_free() when iwl_pcie_nic_init() unwinds a failed iwl_pcie_tx_init() after iwl_pcie_rx_init(). That runs from iwl_trans_pcie_start_fw() during iwl_mvm_start_get_nvm()/iwl_mvm_up() (PCI firmware callback or mac80211 drv_start), not from iwl_pcie_rx_handle() or any 802.11 frame parse.\nAC:H - iwl_pcie_nic_init() only calls iwl_pcie_rx_free() when iwl_pcie_tx_init() fails after a successful iwl_pcie_rx_init(). Reachable failures are ENOMEM in iwl_pcie_tx_alloc() or a non-power-of-two slots_num in iwl_queue_init(); the attacker cannot make RX allocation succeed and the subsequent TX allocation fail on demand.\nPR:L - iwl_op_mode_mvm_start() calls iwl_mvm_start_get_nvm() \u2192 iwl_run_init_mvm_ucode() \u2192 iwl_trans_start_fw() with no capable() check from iwl_req_fw_callback after PCI bind. A local unprivileged process on a host with iwlwifi is sufficient; init-namespace CAP_NET_ADMIN is not required to reach this unwind.\nUI:N - After iwl_pcie_rx_free() in the nic_init unwind, iwl_mvm_start_get_nvm() always calls iwl_mvm_stop_device() (and iwl_run_init_ucode() always calls iwl_trans_stop_device()), so iwl_pcie_rx_napi_sync() uses the stale rxq with no victim mount, file open, or association.\nS:U - The UAF and double-free of trans_pcie->rxq, rx_pool, global_table, and alloc_page stay inside the host iwlwifi PCIe transport on the same kernel authority; this is not a KVM/Xen guest-to-host escape or an IOMMU/DMA bypass.\nC:H - iwl_pcie_rx_free() kfree()s rxq/rx_pool/global_table and __free_pages()s alloc_page without NULL, then iwl_pcie_rx_napi_sync() and _iwl_pcie_rx_init() dereference those freed objects; UAF of those slabs/pages enables arbitrary kernel read.\nI:H - _iwl_pcie_rx_init() writes the dangling rxq/rx_pool/global_table (list restock, netif_napi_add), and a later iwl_pcie_rx_free() from iwl_trans_pcie_free() double-frees the same kmalloc objects, giving a heap write/control-flow primitive.\nA:H - iwl_pcie_rx_napi_sync() walking a kfree'd rxq, or a second iwl_pcie_rx_free() of the same pointers from iwl_trans_pcie_free(), is a kernel oops or panic."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/rx.c"], "versions": [{"version": "9cf671d60fdbeb8f875859c11148cf13c326ada2", "lessThan": "847103369489110a222482c7781e0fe62cdbd3d5", "status": "affected", "versionType": "git"}, {"version": "9cf671d60fdbeb8f875859c11148cf13c326ada2", "lessThan": "c422d5d53f135ea987f745773953a91f9fe30c3f", "status": "affected", "versionType": "git"}, {"version": "9cf671d60fdbeb8f875859c11148cf13c326ada2", "lessThan": "6ec5bf430cf7466cb412e47f2761594092781fac", "status": "affected", "versionType": "git"}, {"version": "9cf671d60fdbeb8f875859c11148cf13c326ada2", "lessThan": "3456c5bcc987aeb182e50e30c9b02be8420e9953", "status": "affected", "versionType": "git"}, {"version": "9cf671d60fdbeb8f875859c11148cf13c326ada2", "lessThan": "2c79d7a7b583050c9f58041465cb46fe3483ab5d", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/rx.c"], "versions": [{"version": "5.12", "status": "affected"}, {"version": "0", "lessThan": "5.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/847103369489110a222482c7781e0fe62cdbd3d5"}, {"url": "https://git.kernel.org/stable/c/c422d5d53f135ea987f745773953a91f9fe30c3f"}, {"url": "https://git.kernel.org/stable/c/6ec5bf430cf7466cb412e47f2761594092781fac"}, {"url": "https://git.kernel.org/stable/c/3456c5bcc987aeb182e50e30c9b02be8420e9953"}, {"url": "https://git.kernel.org/stable/c/2c79d7a7b583050c9f58041465cb46fe3483ab5d"}], "title": "wifi: iwlwifi: pcie: null RX pointers after free", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/rx.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "847103369489110a222482c7781e0fe62cdbd3d5", "status": "affected", "version": "9cf671d60fdbeb8f875859c11148cf13c326ada2", "versionType": "git"}, {"lessThan": "c422d5d53f135ea987f745773953a91f9fe30c3f", "status": "affected", "version": "9cf671d60fdbeb8f875859c11148cf13c326ada2", "versionType": "git"}, {"lessThan": "6ec5bf430cf7466cb412e47f2761594092781fac", "status": "affected", "version": "9cf671d60fdbeb8f875859c11148cf13c326ada2", "versionType": "git"}, {"lessThan": "3456c5bcc987aeb182e50e30c9b02be8420e9953", "status": "affected", "version": "9cf671d60fdbeb8f875859c11148cf13c326ada2", "versionType": "git"}, {"lessThan": "2c79d7a7b583050c9f58041465cb46fe3483ab5d", "status": "affected", "version": "9cf671d60fdbeb8f875859c11148cf13c326ada2", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/wireless/intel/iwlwifi/pcie/gen1_2/rx.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.12"}, {"lessThan": "5.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.111", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.53", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: iwlwifi: pcie: null RX pointers after free\n\nWhen iwl_pcie_tx_init() fails after RX init, nic init unwinds via\niwl_pcie_rx_free().\n\nThe freed RX members stayed non-NULL on the live transport object,\nso later teardown or retry could touch stale RX state.\nSet rx_pool, global_table, rxq, and alloc_page to NULL after free\nto make repeated cleanup and retry paths safe."}], "id": "CVE-2026-93796", "lastModified": "2026-10-30T13:21:03.057", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-24T17:17:12.383", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2c79d7a7b583050c9f58041465cb46fe3483ab5d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3456c5bcc987aeb182e50e30c9b02be8420e9953"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6ec5bf430cf7466cb412e47f2761594092781fac"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/847103369489110a222482c7781e0fe62cdbd3d5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c422d5d53f135ea987f745773953a91f9fe30c3f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: wifi: iwlwifi: pcie: null RX pointers after free", "id": "2540509", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2540509"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nwifi: iwlwifi: pcie: null RX pointers after free\nWhen iwl_pcie_tx_init() fails after RX init, nic init unwinds via\niwl_pcie_rx_free().\nThe freed RX members stayed non-NULL on the live transport object,\nso later teardown or retry could touch stale RX state.\nSet rx_pool, global_table, rxq, and alloc_page to NULL after free\nto make repeated cleanup and retry paths safe.", "A flaw was found in the Linux kernel's iwlwifi driver. When wireless device initialization encounters an error during transmit setup, the cleanup process frees memory allocated for packet reception but fails to clear the corresponding pointers. A local user could trigger subsequent device teardown or retry operations to access the freed memory, leading to a Denial of Service (DoS) through a system crash."], "name": "CVE-2026-93796", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-93796\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-93796\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93796.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,6ec5bf430cf7466cb412e47f2761594092781fac)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,3456c5bcc987aeb182e50e30c9b02be8420e9953)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,2c79d7a7b583050c9f58041465cb46fe3483ab5d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.12.111)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.18.53)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.111,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.53,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "kernel", "vendor": "linux"}], "created": "2026-09-24T20:45:07.554045+00:00", "updated": "2026-10-01T20:15:12.381674+00:00", "vendors": ["linux", "linux$PRODUCT$kernel"]}